US3493189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expansible mandrel
Assignee: INTA ROTO MACHINE CO Inc
•
Filing: 1968-03-21
•
Granted: 1970-02-03
•
Expires: 1988-03-21
Abstract
No abstract record available.
Inventors
- 👤 Philip B Seay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:56
CPC Classifications
B; B65; B65H; B65H75/00; B65H75/02; B65H75/18; B65H75/24; B65H75/242; B65H75/243; B65H75/2437
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2062421A
Cited
US2145806A
Cited
US2289453A
Cited
US3214109A
Cited
US3223341A
Cited
US3273817A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-02 | 1973-08-04 | 1974-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-02 | 1977-08-04 | 1978-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-02 | 1981-08-04 | 1982-02-03 | $7700.00 | Window Closed / Lapsed |